Spinning pot or centrifuge



May 20, 1930. c. L. HOEY SPINNING PDT on CENTRIFUGE Filed Jan. 26, 1929iii/11111011 Patented May 20, 1930 UNITED STATES- PATENT OFFICE jCLAYTON L. HOEY, or refinance, DELAWARE srmnme ro'r: onoEnrmruenApplication filed January 26, 1929. Serial No. 335,239.

This invention relates to what are known as sp nnlng pots or spinningbuckets used in the productlon of artificial silk or rayon. In

the manufacture of rayon, artificial silk in the form of threads issuingfrom the spinnerettes of artificial silk manufacturing machines is ledto a vertically disposed guide tube which is vertically 'reciprocatedwithin the bucket or pot, the bucket or pot being ro-.

tated at a very'high rate .of speed as for in stance at a speed of10,000 R. P. M. Thethread or filament led into the bucket through thetube is caught to the side of the bucket or pot and as the pot rotate-s,this thread is v Wound around the interior of the pot to form whatistechnically known as a cake. Some of the liquid from the precipitating.bath is carried over by these threads into the bucket or pot and if notremoved will collect within the pot and tend to unbalance it, thussetting.

up vibrations in the pot which are particularly objectionable.Furthermore, it is often necessary tov wash ofi the relatively weakthreads when they are firstcarried through the tubular guide andfit isnecessary to get rid of the washing liquidwhich may remain in the pot inorder to prevent an unbalancing thereof and the setting up ofobjectionable vibrations. I

To this end it is common to provide pots of this character withperforations in their sides so that the centrifugal action of thecentrifuge or pot will cause the liquid to be discharged from thethreads and from the pots through these perforations. The perforationsin the side walls of the pots tend to weaken them so that thecentrifugal action upon the rapidly rotating pots will tend in case ofany Weakness to cause the pots to burst.

The general object of the present invention 7 is to provide means forthe discharge of any liquid which may pass into the pot withoutexcessive or any weakening of the walls of the'pot by the use of many orany perforations therein, thus materially increasing the strength of thebucket or pot.

A further object is to so construct the pot that any excess of thecoagulating or setting bath that drips to the bottom without comorcoil.

ing into contact with the coil or cake of rayon may be thrown offwithout this excess being thrown by centrifugal action against the cakeor coil, thus discoloring the rayon cake invention is illustrated in theaccompanyingdrawing,wherein: .Figure lfis' a vertical sectional Viewthrouglr'av spinning 'p'otor" centrifuge conostr ucted in accordance,witlrn y invention"; C9 Figurel2 is a top; plan view thereof;

igure 3 an enlarged fragmentary vertical section throughthe'pot; Inthedrawing Ihave shown astandard form of spinning pot, xit beingunderstood, however, that the drawing is urely an illustrationof theapplication 0 my invention .to one form of pot-and the pot i'night bemodifiedin shapeor configuration without in any way departin from-thespirit of the. inven- 79 tion as define 'in the appendedfcl'aims."

' The pot-,1 "'gwhiclr'isof'cast metal has a I relatively flat bottom'designatedi generally 11 and a central hub 12 which is'adapted to bedisposed 'within'the socket of a rotating spindle and eitherrotated byfriction with thespindlei or to have positive engagement with thespindle for rotation. Extending downwaird into the bucket is the -usualguide with a plurality .of perforations or drainage I openings 14 ifdesired or found necessary, but my invention resides in the provision ofpassages 15 extending inward radially through the bottom wall 11 of thebucket or pot from the exterior thereof and intersecting a depression 16in the bottom surface of the pot, the bottom of this depression beingvery slightly angled or conical.

In other words, this surface which is concentric to the centerofrotation of the pot 1 from the precipitating bath .or washing liq:

' extendsupwar'd and centrally at a very slight 3 vention, though- 1 donot wish to be limited angle. -It is to be "noted that the Outer wall 17of the depression is downwardly and out wardly inclined to intersect thepassages "as shown most clearly in Figure 3. I regard this as animportant-feature of'my into it except asdefin'ed in the, claims, v

-With a pot constructed in accordance with my invention any liquid suchas the liquid uid or angthing of this nature which drips v downwar tothe bottom of the pot is thrown outward by centrifugal force and is discharged through the passages lithe-openings of the passages 15intersecting, at a slight in: clination, the bottom of the bucket or potat the overhanging wall 17, and acting toguide vvany liquid into thechannels or passages 15.

It is to be particularly noted that the "cake- A 'is'disposed outward ofthe mouths 17 or f entrances'of the. passages 15 so-that by no v chancecanthe cake in any way obstruct these passages,';Whereas were theopeningsof .the'passagesdisposedclosely adjacent the side wall of; thepot,. the cake? as it slips down underthe action of gravity, or if itwere v led by. the reciprocating guide tube 13 close to the bottom ofthe pot, would tend to obstruct through these openings.

' 4'0 bottom having a central depression'inward of I claim X 1. .Acentrifuge of the character described having a; circular side wall andbottom, the

from the low the surface of the bottom-an opening into depression, thebottom of said depression being, upwardly and centrally inclined,the-apex of this upwardly-inclined i of the centrifuge. l v

..4.; A centrifuge of the character described having aside wall and abottom, the bottom having a centrally'disposed depression concentric-tothe "side wall and the axis of the centrifuge, the bottom of saiddepression atits center being extended upward to an apperiphery of thecentrifuge andbebottom being coincident with the vertical axis proximatelevelwith the, lower end of the side wall'and the bottom; havingdischarge passages opening intothe depression.

In testimony whereof I hereunto aflixfjmy Y .CLAYTONL. Ho'EY signature.

-,these openings as the YFc'ake does obstruct the side wall, the bottomof-the depression ex- 1 tending upward toward the center at a slightangle to a levelwith the outer portion of the bottom and the outer wallof the depression overhangingv and the bottom of the centrifuge beingprovided with'a plurality .of radial pas:

sages opening through said outer wall of the depression. V

2. A centrifuge of the character described having aside wall and abottom, the bottom being formed with'a central depression and with ,aplurality of radial passages extending inward from the periphery of thecentrifuge J a below the surface of the bottom and opening into saiddepression, the bottom of the centrifuge at the center thereof beingupwardly andcentrally inclined, the center of.

the upwardly and centrally inclined-portion being approximately on alevel with that portion of the bottom outward of the depression. I 3.A'centrifuge of the character described having a side wall and a bottom,the bottom being formed with a depression and with a plurality of radialpassages extending inward

